Meat cutter



Sept; 27, 1938. l c. w. DIECKMANN". 2,131,429

MEAT CUTTER Filed Nov. ll, 1936 UIIINIHSIIISIN M7/149%, l?? m WW' knife fits.

Patented Sept. 27, 1938 UNITED 2,131,42a i l MEAT' 1 A Charles W. Dieckmann; Chicago, Ill.

Application November 11, 1936, Serial No. 110,231

1 Claim.

The invention relates to rotary meat cutters or knives.

The object of the invention is to provide a rotary knife or cutter which consists of a stamped metal plate having integral blades with cutting flanges bent ob-liquely from the plane of the blades with means for effectively securing the blade to the spider, which makes it possible to use the knife until the cutting flanges are worn down to the plane of the knife blades and which permits the knife and the spider to be quickly and readily connected and disconnected.

Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by the claim at the conclusion hereof.

In the drawing:

Fig. 1 is a fragmentary longitudinal section of a meat cutter embodying the invention. Fig. 2 is a side elevation of the rotary knife. Fig. 3 is a side elevation 'of the spider on which the cutter is removably secured. Fig. 4 is a section on line 4--4 of Fig. 2 with the knife attached to the blade.

The invention is exemplified in a machine comprising a cylindrical body 5, a feed-screw 6 rotatable in the body and adapted to be driven by any suitable means. A perforated plate 1 is held in the discharge end of the body 5 by a screw-collar 8. A spindle 9 on the feed-screw 6 extends through plate I and is provided between the plate and the outer end of the screw with a polygonal portion I on which the rotary knife is carried and by which the knife is driven. These parts may be of conventional construction.

The knife is carried by a spider which comprises a hub II having an opening therein to fit around the polygonal portion I0 of the spindle 9 and four arms I2 extending radially outward from the hub. Each arm I2 has xed therein a stud I3 which has a flared head I4 projecting from the face of the spider against which the The knife is stamped from a plate of metal and consists of a hub I of a single thickness of the plate and radially extending blades or arms I 6 adapted to overlie and fit against the contiguous face of the spider. The arms I6 and hub I5 are in the plane of the plate from which the knife is formed. One of the radial marginal portions of each of the knifeblades I6 is bent obliquely to the plane of the hub I5 and arms IB to form radially extending flanges adapted to engage the inner face of the perforated plate 'I for cutting or grinding the meat. The outer edges I8 of the flanges I'I are ground so they will be parallel to the plane of the plate 1. Each blade I6 of the knife has cut therein a countersunk arcuate slot 20' which extends circumferentially from and is open at the rear edge of the arm and has a semi-annular end 2I. These slots are adapted to register with and to receive the studs I3. The Wall of each slot is flared to conform to the flare on the head I4 of a stud I3. The stud-head I4 does not ex-v ceed in thickness the arms I6 or the plate from which the knife is stamped, so that the outer faces of the heads I4 will be substantially flush with and will not project beyond the outer face of the knife-blades where they travel freely in the meat behind the knife. 'Ihe knife is connected to the spider by placing the knife against the spider and by rotating the knife relatively to the spider so the undercut heads I4 on the spider-arms I2 pass into the open ends of the flared slots 20 and are seated in the semi-annular inner ends 2| of the slots.A By reverse rotation, the knife may be readily separated or disconnected from the spider for convenience in grinding the cutting-edges of the knife or replacing it.

The shanks of studs I3 may be xedly secured in the spider by screw threads or may be pressed into holes in the spider.

In use, the flanges II are subjected to wear from contact with the inner face of perforated plate 1. In some instances, it becomes necessary to sharpen the cutting-edges by grinding. An important characteristic of the construction set forth is that the knife remains usable and operative until the flanges I'I have been worn or ground away to the plane of the outer face of the plate. and is made possible by using devices which connect the knife tothe spider and lie within the plane of the outer face of the arms and hub of the knife. Another characteristic* o-f the construction described isthat the countersunk slots and undercut heads of the studs I3 cause the knife to be wedged against the outer face of the spider, securely, and positioned concentrically on the spider and held in a true transverse plane so that the cutting-edges of the knife will rotate in the plane of the plate 'I and be unlformly worn. 'I'he studs I3 may be fixedly secured in the spider since it is not necessary to adjust or remove them in connecting or disconnecting the spider and the knife.

The invention is not to be understood as re- This increases the life of the knife stricted to the details set forth, since these may I5 be modied Within the scope oi the appended claim, without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

A cutter for a meat grinder comprising a spider having a hub adapted to be driven by and mounted on a shaft, flared heads xed on and projecting irom. oneiace oi the..spider,a knife fit ting against onejfa'ce'of; the,1spider;',formed ci a stamped plate of metal and comprising an integral hub and a series of radial arms, eachs arm having a iiange projecting laterally there? from with its outer end forming a. radial. cut--A ting edge at the front of the arrn, the armsshav.-

ing countersunk slots with inclined edges open at and extending inwardly from the rear edges and terminating rearwardly of the flanges, the ared y heads and inclined edges of the slots forming, by

CHARLES W. DIECKMANN. 

